Hydralazine hydrochloride
Also known as: 1-Hydrazinophthalazine hydrochloride, 1-Hydrazinylphthalazine hydrochloride, Apresoline, Apulon, Asozart, Dralzine, Hydrapress, Hyperazin, Lopres, Pressfall, nor-press25, phthalazin-1-ylhydrazine hydrochloride, 1(2H)-Phthalazinone, hydrazone, monohydrochloride, Hydralazine HCl, Apresine, Rolazine
Hydralazine hydrochloride (CAS 304-20-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H9ClN4 and a molecular weight of 196.637 g/mol. Key properties include a melting point of 273°C, a boiling point of 491.9ºC at 760 mmHg and a flash point of 251.3ºC. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 304-20-1
- Jingsj CID
- J-11415-8
- Molecular Formula
- C8H9ClN4
- Molecular Weight
- 196.637 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 273°C |
|---|---|
| Boiling Point | 491.9ºC at 760 mmHg |
| Flash Point | 251.3ºC |
| Exact Mass | 196.051575 |
| PSA | 63.10000 |
| LogP | 1.72400 |
| Storage Conditions | -20?C Freezer |
| Stability | Stable. Incompatible with strong oxidizing agents. |
GHS Safety & Compliance
- H301 — Toxic if swallowed
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Bourreli, B., et al., Additive effects of dihydralazine during enflurane or isoflurane hypotensive anaesthesia for spinal fusion. Can J Anaesth, 1988. 35(3 ( Pt 1)): p. 242-8. [2]. Kandler, M.R., et al., Hydralazine for essential hypertension. Cochrane Database Syst Rev, 2010(8): p. CD004934. |
|---|
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Hydralazine hydrochloride?
The CAS number of Hydralazine hydrochloride is 304-20-1.
What are the molecular formula and molecular weight of Hydralazine hydrochloride?
Hydralazine hydrochloride has molecular formula C8H9ClN4 and molecular weight 196.637 g/mol.
Is Hydralazine hydrochloride hazardous?
Hydralazine hydrochloride has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of Hydralazine hydrochloride?
For Hydralazine hydrochloride, Downstream Products: 3-Methyl-1,2,4-triazolo[3,4-a]phthalazine, 1(2H)-Phthalazinone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Hydralazine hydrochloride (CAS 304-20-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-11415-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.